Patents by Inventor Vernon P. Fruehauf

Vernon P. Fruehauf has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Film embossing process
    Patent number: 4721592
    Abstract: Two or more sheets of polyvinyl fluoride film fuse together without the use of adhesive or embossing resin when passed through a hot roll embossing machine. The pressures, temperatures and feed rate are critical and depend on film thickness and the depth and type of pattern used.
    Type: Grant
    Filed: January 23, 1987
    Date of Patent: January 26, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Vernon P. Fruehauf, Albert H. Hoefling, William S. Schlegel